1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mariarad [96]
3 years ago
11

How many soulutions does the system of equations have x-3y=15. and 3x-9y=45

Mathematics
1 answer:
Irina-Kira [14]3 years ago
5 0

Answer:

<h2>Infinitely many solutions</h2>

Step-by-step explanation:

\left\{\begin{array}{ccc}x-3y=15\\3x-9y=45\end{array}\right\\\\\text{Divide both sides of the second equation by 3}\\\\\dfrac{3x}{3}-\dfrac{9y}{3}=\dfrac{45}{3}\\\\x-3y=15\\\\\text{We received the same equation as the first.}\\\\\bold{CONCLUSION}\\\\\text{The system of equations has infinitely many solutions.}

\left\{\begin{array}{ccc}a_1x+b_1y=c_1\\a_2x+b_2x=c_2\end{array}\right\\\\\text{If}\ a_1=a_2,\ b_2=b_2,\ c_1=c_2,\ \text{then the system of equations}\\\text{ has infinitely many solutions}\\\\\text{If}\ a_1=a_2,\ b_1=b_2,\ c_1\neq c_2,\ \text{then the system of equations}\\\text{has no solutions}\\\\\text{Other the system of equations has one solution.}

You might be interested in
See question above ^^​
denpristay [2]
I think the answer is (4) because if you rotate AEC to the left (counterclockwise) and follow by the scale factor of 2 so, CE = 4x2 = 8 and CA = 3x2 = 6. Hope this help :))
7 0
3 years ago
Divide. Write your answer as a fraction in simplest form.<br><br> −10 2/7÷(−4 4/11)= NEED ASAP
Otrada [13]

Answer:

33/14

hope this helps :)

8 0
3 years ago
Will award brainliest answer!!!!A support beam needs to be placed at a 28° angle of elevation so that the top meets a vertical b
Andrews [41]
3.4 meters because you can you use it sorry if misunderstood hope it helped.
3 0
3 years ago
George is twice the age of Mike minus 5. The sum of George and Mike's ages is 31. How old is George and write an equation to rep
Temka [501]

Answer:

  • George is 19

Step-by-step explanation:

George is g and Mike is m

  • g = 2m - 5
  • g + m = 31

Substitute g in the second equation

  • 2m - 5 + m = 31
  • 3m - 5 = 31
  • 3m = 36
  • m = 12

Finding g

  • g = 2*12 - 5 = 24 - 5 = 19
6 0
3 years ago
April takes 2 vitamins each day from a bottle that contains 250 pills when she bought it. Which of these could be used to determ
Vadim26 [7]
Y= 250 - 2x this should be the answer
4 0
4 years ago
Other questions:
  • Faction help plz!!!!
    14·1 answer
  • -0.8662866239 is rational or irrational
    8·2 answers
  • The fraction 4/5 considered a (n)
    11·1 answer
  • Three friends (A, B, and C) will participate in a round-robin tournament in which each one plays both of the others. Suppose tha
    7·1 answer
  • A caterpillar is 2.83 centimeters long how long is it to the nearest whole number
    5·2 answers
  • Today you deposited $5000 into a savings account paying 12% interest. how much shouldyou have in 15 years
    14·1 answer
  • Please answer 5 questions its urgent!
    11·1 answer
  • PLZ HELP I WILL GIVE BRAINLIST
    11·2 answers
  • Is sin( - 7) positive or negative? (Why?)
    11·1 answer
  • The figure is formed from rectangles. Find the total area. The diagram is not to scale.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!